John 1:29-41 (NIV)
29 The next day John saw Jesus coming toward him and said, “Look, the Lamb of God, who takes away the sin of the world! 30 This is the one I meant when I said, ‘A man who comes after me has surpassed me because he was before me.’ 31 I myself did not know him, but the reason I came baptizing with water was that he might be revealed to Israel.” 32 Then John gave this testimony: “I saw the Spirit come down from heaven as a dove and remain on him. 33 I would not have known him, except that the one who sent me to baptize with water told me, ‘The man on whom you see the Spirit come down and remain is he who will baptize with the Holy Spirit.’ 34 I have seen and I testify that this is the Son of God.” 35 The next day John was there again with two of his disciples. 36 When he saw Jesus passing by, he said, “Look, the Lamb of God!” 37 When the two disciples heard him say this, they followed Jesus. 38 Turning around, Jesus saw them following and asked, “What do you want?” They said, “Rabbi” (which means Teacher), “where are you staying?” 39 “Come,” he replied, “and you will see.” So they went and saw where he was staying, and spent that day with him. It was about the tenth hour. 40 Andrew, Simon Peter’s brother, was one of the two who heard what John had said and who had followed Jesus. 41 The first thing Andrew did was to find his brother Simon and tell him, “We have found the Messiah” (that is, the Christ).